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authorJamie Lentin <jm@lentin.co.uk>2015-08-11 22:40:52 +0100
committerJiri Kosina <jkosina@suse.cz>2015-08-12 14:32:31 +0200
commit3cb5ff0220e31bd1043bb18fd5765c9f86928491 (patch)
tree70369e3713cd7b5f2235e16c605566e6a083a91e /drivers/hid/hid-lenovo.c
parentdbfebb44b7c650dd134a8be07f9afd5862150987 (diff)
downloadlinux-3cb5ff0220e31bd1043bb18fd5765c9f86928491.tar.bz2
HID: lenovo: Hide middle-button press until release
Don't relay a middle button press to userspace until release, and then only if there was no scroll events inbetween. This is closer to what Xorg's wheel emulation does, and avoids spurious middle-click pastes. Signed-off-by: Jamie Lentin <jm@lentin.co.uk> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-lenovo.c')
-rw-r--r--drivers/hid/hid-lenovo.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index d40221d78188..e4bc6cb6d7fa 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -37,6 +37,7 @@ struct lenovo_drvdata_tpkbd {
};
struct lenovo_drvdata_cptkbd {
+ u8 middlebutton_state; /* 0:Up, 1:Down (undecided), 2:Scrolling */
bool fn_lock;
int sensitivity;
};
@@ -316,6 +317,53 @@ static int lenovo_raw_event(struct hid_device *hdev,
return 0;
}
+static int lenovo_event_cptkbd(struct hid_device *hdev,
+ struct hid_field *field, struct hid_usage *usage, __s32 value)
+{
+ struct lenovo_drvdata_cptkbd *cptkbd_data = hid_get_drvdata(hdev);
+
+ /* "wheel" scroll events */
+ if (usage->type == EV_REL && (usage->code == REL_WHEEL ||
+ usage->code == REL_HWHEEL)) {
+ /* Scroll events disable middle-click event */
+ cptkbd_data->middlebutton_state = 2;
+ return 0;
+ }
+
+ /* Middle click events */
+ if (usage->type == EV_KEY && usage->code == BTN_MIDDLE) {
+ if (value == 1) {
+ cptkbd_data->middlebutton_state = 1;
+ } else if (value == 0) {
+ if (cptkbd_data->middlebutton_state == 1) {
+ /* No scrolling inbetween, send middle-click */
+ input_event(field->hidinput->input,
+ EV_KEY, BTN_MIDDLE, 1);
+ input_sync(field->hidinput->input);
+ input_event(field->hidinput->input,
+ EV_KEY, BTN_MIDDLE, 0);
+ input_sync(field->hidinput->input);
+ }
+ cptkbd_data->middlebutton_state = 0;
+ }
+ return 1;
+ }
+
+ return 0;
+}
+
+static int lenovo_event(struct hid_device *hdev, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ switch (hdev->product) {
+ case USB_DEVICE_ID_LENOVO_CUSBKBD:
+ case USB_DEVICE_ID_LENOVO_CBTKBD:
+ return lenovo_event_cptkbd(hdev, field, usage, value);
+ default:
+ return 0;
+ }
+}
+
static int lenovo_features_set_tpkbd(struct hid_device *hdev)
{
struct hid_report *report;
@@ -708,6 +756,7 @@ static int lenovo_probe_cptkbd(struct hid_device *hdev)
hid_warn(hdev, "Failed to switch middle button: %d\n", ret);
/* Set keyboard settings to known state */
+ cptkbd_data->middlebutton_state = 0;
cptkbd_data->fn_lock = true;
cptkbd_data->sensitivity = 0x05;
lenovo_features_set_cptkbd(hdev);
@@ -835,6 +884,7 @@ static struct hid_driver lenovo_driver = {
.probe = lenovo_probe,
.remove = lenovo_remove,
.raw_event = lenovo_raw_event,
+ .event = lenovo_event,
.report_fixup = lenovo_report_fixup,
};
module_hid_driver(lenovo_driver);